<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click='logout'>退出</el-button>
    </el-header>
    <!-- 页面主题区 -->
    <el-container>
      <!-- 页面侧边栏 -->
      <el-aside :width="isCollapse ?'60px':'200px'">
        <!-- 侧边栏菜单区 -->
        <div class="toggle-button" @click="toggleCollapse">
          |||
        </div>
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#ffd04b"
      unique-opened="true"
      :collapse="isCollapse"
      :collapse-transition="false"
      :router = 'true'
      :default-active = "activePath">
      <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" v-for='item in menulist' :key='item.id'>
        <!-- 一级菜单的模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconobj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path" v-for ='subItem in item.children' :key='subItem.id' @click="saveNavState('/'+subItem.path)">
        <template slot="title">
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
      </el-aside>
      <!-- 页面主题部分 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      menulist: [],
      iconobj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的动态地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      console.log(res)
      this.menulist = res.data
    },
    // 点击按钮收缩菜单
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  // 左右贴边对齐
  justify-content: space-between;
  padding-left: 0;
  // 按钮上下居中
  align-items: center;
  color:#fff;
  font-size: 20px;
  //嵌套
  >div{
    display: flex;
    align-items: center;
    span{
      margin-left:15px;
    }
  }
  }
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right:0;
  }
}
.iconfont{
  margin-right:15px;
}
.el-main{
  background-color: #EAEDF1
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  // 字体之间的间距
  letter-spacing: 0.4em;
  cursor: pointer;
}
</style>
